<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			*{
				padding: 0;
				margin: 0;
			}
			.box {
				margin: 50px;
				width: 100px;
				height: 100px;
				border: 1px solid red;
			}
			.box:hover{
				box-shadow:/*inset*/ 6px 6px 4px #ddd ;
			}
		</style>
	</head>
	<body>
		<div class="box"></div>
	</body>
</html>
